Java

With this short blog post, I am going to share with you a few ways you can read application properties from application.properties file in Spring Boot. I am going to share 3 ways: Read application.properties using Environment object,  Read a property from application.properties file using @ConfigurationProperties and reading a property using the @Value annotation. To demonstrate how…

Read More Reading application.properties in Spring Boot

With this blog post, I am going to share with you Spring MVC annotations for mapping HTTP requests into specific handler methods. Then @PostMapping, @GetMapping, @PutMapping and the @DeleteMapping. In most of the Spring MVC applications, you will see the use of @RequestMapping annotation, which I am also going to include in this blog post. But I will…

Read More Spring MVC – @PostMapping, @GetMapping, @PutMapping, @DeleteMapping

With this blog post, I am going to share what I needed to do to make JPA work in my Jersey 2 Web Services App. I have created my Jersey 2 app using the following maven snippet: mvn archetype:generate -DarchetypeGroupId=org.glassfish.jersey.archetypes \ -DarchetypeArtifactId=jersey-quickstart-webapp -DarchetypeVersion=2.26 I then opened pom.xml and added a few new dependencies which I…

Read More Configuring JPA in Jersey 2 Web App

Create a Servlet Container deployable Jersey web application Create new Jersey web application using Maven. The project created with the below jersey-quickstart-webapp archetype can be built and deployed to a servlet container like for example Apache Tomcat. mvn archetype:generate -DarchetypeGroupId=org.glassfish.jersey.archetypes \ -DarchetypeArtifactId=jersey-quickstart-webapp -DarchetypeVersion=2.26 POM.XML Dependency to Support JSON To support JSON in your Jersey Web App add…

Read More RESTful Web Services with Jersey and Spring Data JPA – Cheat Sheet

Recently I have published a video course that teaches how to use Java JAX-RS to create a RESTful Web Service for your mobile application and how implement features like user Sign up, Sing in and how to communicate with protected Web Service Endpoints. I would love it if you check it out and hopefully like it, find…

Read More Deploy Web Application Archive(WAR) to Amazon AWS EC2 Linux Instance

In this blog post I would like to share with you how to use Java 8 Functional Interfaces and how to create your own functional interface. What is Functional Interface? Functional interface is a Java interface with single abstract method. Below is a very simple example of a functional interface: package com.appsdeveloperblog; @FunctionalInterface public interface MyFunction<A,…

Read More Java 8 Functional Interface Tutorial